docs: genericize local username/path references for a public repo

Replace machine-specific `faqih` user and absolute home path with generic
wording ($USER / /path/to/postgresql-fdw) so the docs read cleanly for anyone.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: programmerShinobi

docs/01-REQUIREMENTS.md

@@ -10,9 +10,9 @@
 - [ ] **Docker Compose v2** (the `docker compose` subcommand) — check: `docker compose version`
 - [ ] **GNU Make** (optional but recommended) — check: `make --version`
 - [ ] **Git** — to clone & version this repo
-- [ ] Your user can run Docker **without `sudo`**. On this laptop `faqih` is
-      **not** in the `docker` group yet, so docker commands currently need
-      `sudo`. Fix it once (recommended) so `make` works cleanly:
+- [ ] Your user can run Docker **without `sudo`**. If your user is **not** in
+      the `docker` group yet, docker commands will need `sudo`. Fix it once
+      (recommended) so `make` works cleanly:
       ```bash
       sudo usermod -aG docker $USER
       # then log out and back in (or: newgrp docker) for it to take effect

docs/02-INSTALLATION.md

@@ -4,8 +4,8 @@
 
 ## 2.0 Docker permissions (one-time, do this first)
 
-On this laptop the `faqih` user is **not** in the `docker` group, so `docker`
-and `make` will fail with `permission denied ... /var/run/docker.sock`. Fix once:
+If your user is **not** in the `docker` group, `docker` and `make` will fail
+with `permission denied ... /var/run/docker.sock`. Fix once:
 
 ```bash
 sudo usermod -aG docker $USER

docs/07-BACKUP-RESTORE.md

@@ -57,7 +57,7 @@ docker compose exec -T postgres pg_dump -U local_dev -d local_db \
 
 ```cron
 # crontab -e  → daily at 02:30
-30 2 * * * cd /home/faqih/Documents/projects/me/postgresql-fdw && make backup >> backups/cron.log 2>&1
+30 2 * * * cd /path/to/postgresql-fdw && make backup >> backups/cron.log 2>&1
 ```
 
 **Option B — in-database with pg_cron** (logical dump still needs the host, but